Instruction Manual
67AX and 67AD CCP Ground Microphone System | 9
Dimensions and Data for 67AD
Dimensions
Microphone
Ø13.2 mm
Housing
Ø18.0 mm
Microphone set height
Without grid
8 mm
With
9.20 mm
Weight
15 g
Mounting Plate
Ø400 mm
Frequency response for the set
±2.0 dB
3.15 Hz – 10 kHz
±1.0 dB
12.5 Hz – 7 kHz
Nominal sensitivity for the set
at 250 Hz
50 mV/Pa
Polarization voltage
0 V
Dynamic range for the set
Upper limit (3 % distortion)
138 dB re. 20 µPa
Thermal noise
18 dB(A) re. 20 µPa
Temperature
Operation
–30 °C to +70 °C / 22 °F to 158 °F
Storage
–40 °C to +85 °C / 40 °F to 185
Temperature coeffi
cient
-0.01/-0.006 dB/ °C
Static-pressure coeffi
cient
250 Hz/25 °C
-0.008 dB / kPa
Humidity (non-condensing)
Range
0 – 100 % RH
Infl uence (250 Hz)
<0.1 dB (0 – 100 % RH)
Infl uence of axial vibration equivalent to 1 m/s²
66 dB re. 20µPa
Venting
Rear-vented
Data was collected in a temperature of 23 °C (±3 °C) and in a relative humidity of 60 % ±20 %.
